1. The night highlights and reflects light, and the night reflection technology makes it safer to walk at night. The backpack is designed to reflect light in the dark environment, which improves the safety of running and cycling activities at night. 2. Nylon fabric, light, soft, wear-resistant and water-splashing-proof, selected high-quality nylon fabric, water-splashing-proof coating process, according to the principle of lotus leaf effect, has the characteristics of light, soft, strong and wear-resistant. 3. Shoulder strap storage design, shoulder strap storage can hold two 420ML soft kettles and energy glue and other supplies, and shoulder strap zipper storage can hold small items, cards, change and other personal belongings. 4. Sliding bust adjustment system, which can be quickly disassembled to adjust tightness, and is simple and easy to use. Mountaineering pole plug-in device, designed by elastic rope, stable and not shaking. 5. Design of warning strip at night, which can warn the night movement under the illumination of light source.